He is so busy. He cannot afford enough time with his son ______ he wants to.
| A．even if | B．as if |
| C．because | D．unless |
The reason why he failed is ______ he was too careless.
| A．because | B．that | C．for | D．because of |
We were about to climb up to the top of the mountain ________ it began to rain heavily.
| A．as | B．while | C．when | D．since |
—How do you find my idea?
—_______.
| A．By opening your notebook. | B．I don’t like it a bit. |
| C．You showed it to me. | D．When I came in, I found it. |
Don’t you think that______________ is no use promising without doing?
| A．this | B．that | C．it | D．what |
Is this the girl______ whom I can turn for help? Is she good at this subject?
| A．to | B．with | C．in | D．at |